Space and headcount decide which of these games your party can hold: a giant inflatable dartboard and lawn beer pong need a yard with room behind the target, while a memory jar or a poster of 40 compliments works in a living room.
The list runs from a paper-and-pen bingo card to lawn games that need turf, and the cheapest builds, like 6 large red trash bins arranged in a triangle for beer pong, still fill an afternoon.
Pick for the room first, then the crowd.
1. Birthday Bingo
Bingo cards swap numbers for party moments, so guests mark a square when someone toasts, tells a story about the birthday person, or snaps a photo.
At a 40th, I’d fill the squares with inside jokes and decade references instead of generic party actions.
Print one card per guest and set out pens or small candies as markers. Give a small prize to the first full row, since a prize keeps people watching the room instead of their phones.
2. Giant Inflatable Dartboard
Kicking beats throwing here. A giant inflatable dartboard lets adults in dress shoes stay in the game, and the two labeled balls, one per player, keep turns simple.
Set it on flat turf or grass, and clear a few feet of space behind the board for stray shots. Run it as a head-to-head bracket, and the line forms on its own.
3. Giant Lawn Beer Pong
Large red trash bins stand in for cups, which makes lawn beer pong a cheap build: buy 6, arrange them in a triangle, and mark a throwing line with rope or a garden hose.
Fill the bins with water or leave them empty, and use big balls that match the scale. I’d keep the drinking optional and offer lemonade as a swap, so the game works for every guest at a 40th.
4. Memory Jar Keepsake Activity
Put a glass jar and a stack of colored paper slips near the entrance, and ask each guest to write a memory or wish for the birthday person.
A string of fairy lights tucked inside makes the jar glow after dark.
The birthday person can read the notes later, one a day, which stretches the party out. Use a wide-mouth jar so hands fit, and set out several pens.
5. 40 Things We Love About You
A poster titled "40 Things We Love About You" gives guests numbered boxes to fill with handwritten compliments.
Guests sign their entries, which makes it a keepsake.
Start filling a few boxes yourself before the party so nobody faces a blank board, and keep markers on a string so they stay put. Frame it afterward.
6. Cornhole Outdoor Lawn Games
Cornhole is the safest pick for a mixed crowd: easy rules, no skill barrier, and it fits on a patio.
Pair one set of boards with giant Jenga and giant Connect Four, and guests can drift between games without any organizing from you.
Keep the games close to the food and seating so they stay social. I’d skip a formal tournament unless the crowd is competitive; casual play suits a 40th better.
Choosing the Right Games
4 things decide which games make the cut: the guest of honor’s tastes, the headcount, the space, and the clock.
Start with the person being celebrated. A trivia-loving 40-year-old will enjoy a quiz more than any lawn game, so let their habits decide.
Headcount comes next.
A game that needs 8 players flops with 6 guests, and one that runs in turns drags with 40. Match the format to the crowd.
Space is the third filter. A big backyard handles active games, while a living room needs something guests can play from the couch.
Last, set a time limit.
Stop each game while people still want more, before energy dips. That is a rule of thumb, not a rule, but a short game beats a long one nearly every time.
Mixing Game Types
A party works best when loud games and quiet ones share the schedule. Some guests want to compete in teams, and others want to hold a drink and talk, so offer both.
For the active side, an escape room at home suits a small group. Split guests into teams and let the friendly rivalry do the work, since it also pushes people to cooperate.
A scavenger hunt is the other option I like, and it suits a bigger crowd. It sends guests around the whole space, which gets people moving and mixing.
Then leave something low-pressure running in the background. Guests can join or skip it, and nobody feels forced into the spotlight.
Creating Keepsakes
A guestbook with a twist beats a plain signing book. The advice prompt gets the funniest answers.
For a more visual keepsake, add a Polaroid camera. Guests snap a photo and attach it to their note, so the honoree ends up with pictures and words together.
Place the station near the entrance so guests write early, before the party gets loud. Leave a few sample prompts on a card so nobody stares at a blank page.
Frequently Asked Questions
What are some good games for 40-year-olds?
Cornhole is the safest pick for a mixed crowd, since the rules are easy, no skill is needed, and it fits on a patio. Birthday bingo with squares built from inside jokes and decade references also works well.
Trivia works well when the birthday person loves quizzes, and charades and scavenger hunts are other solid picks for adults. Let the honoree’s tastes decide first.
What is the 40th birthday game?
No single game belongs to a 40th.
The best ones are built around the birthday person, like bingo filled with their inside jokes, trivia about their life, or a memory jar where guests write down a memory or wish. Personal details keep the game from feeling generic.
What are some unique games I can play at a birthday party?
A giant inflatable dartboard is a fun one: players kick two labeled balls, so adults in dress shoes can join in.
Giant lawn beer pong works with 6 large red trash bins set in a triangle, and lemonade can replace the drinks. An at-home escape room works with 4–6 players, and a scavenger hunt stretches to a bigger crowd.
